New Outbreaks of Verticillium Wilt on Hop in Oregon Caused by Nonlethal <i>Verticillium albo-atrum</i>

Fig. 2. Spatial pattern of hop plants (cultivar Nugget) affected by Verticillium wilt caused by Verticillium albo-atrum in 2006 (left) and 2007 (right). Small open circles indicate hills (groups of one or more plants) with at least one wilted bine. The larger closed circles indicate hills where no green shoots were observed at the time of the disease ratings (8 and 9 August 2006, and 13 and 14 August 2007) and were presumed dead. Note that spring pruning of the hills was conducted by mechanical means in the north-south direction in this yard. Hop debris remaining after harvest was spread on the south end of the hop yard in 2005 but not in 2006.



Image from Plant Health Progress article:
New Outbreaks of Verticillium Wilt on Hop in Oregon Caused by Nonlethal Verticillium albo-atrum